Summer 2005 ETS

Deep Tremor in Cascadia Zone - Special Seismic and Geodetic studies
Sept. 6-30, Summer, 2005

Main Tremor Index   |     Interactive Tremor Map   |     Realtime Tremor Map   |     ETS diagnostic Spectrograms   |    
ETS diagnostic Webicorders   |     PGC TAMS/SSA   |    

This ETS is over. There is a new set of pages for the fall 2006 ETS.

This page will have frequent updates from observations and studies of Cascadia deep tremor expected during the late summer and early fall of 2005. News will be posted (latest at the top) and figures from time to time.

NEWS (latest at the top)


The project, "Stalking Cascadia episodic tremor and slip with enhanced GPS and seismic arrays", is the first EarthScope funded use of the new UNAVCO supported pool of Topcon GB-1000 campaign GPS systems. Principal investigators Ken Creager and Dan Johnson of the University of Washington and Rick Bennett of the University of Arizona hope to gain a better understanding of the periodic slow earthquakes that have been recently discovered to occur in the Cascadia subduction zone using a dense array of both GPS and broadband seismic equipment. The deployment is expected to be completed by mid-August and will last up to 3 months or until the ETS event has completed.

In anticipation of a main ETS event taking place sometime between Aug and Oct, 2005 the PNSN has requested seismic instruments from the flexible array of NSF's EarthScope program to install in the northern Olympic Peninsula. These instruments will be installed in a combination of array configuration and distributed network configuration in the Sequim-Port Angeles area. A small NSF grant has been awarded to help with the logistics of these installations. Combined with the regular seismic stations of the PNSN, strain and seismic stations of the Plate Boundary Observatory (PBO) and the PANGA array, and the Pacific Geoscience Centre we should get some very high quality data from this expected ETS.